package com.imooc.api.interceptors;

import org.springframework.lang.Nullable;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Description : 用户Token拦截器
 * @Author : YTY
 * @Date : 2020-11-29 08:17
 */
public class UserTokenInterceptor extends BaseInterceptor implements HandlerInterceptor {

    /**
     * 拦截请求，在访问Controller调用之前
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        String userId = request.getHeader("headerUserId");
        String userToken = request.getHeader("headerUserToken");

        /**
         * 判断是否放行
         * false：请求被拦截，被驳回，验证出现问题
         * true：请求在经过校验以后，OK，可以放行
         */
        boolean run = verifyUserIdToken(userId, userToken, REDIS_USER_TOKEN);
        System.out.println(run);

        return run;
    }

    /**
     * 请求访问Controller之后，渲染视图之前
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {

    }

    /**
     * 请求访问Controller之后，渲染视图之后
     * @param request
     * @param response
     * @param handler
     * @param ex
     * @throws Exception
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {

    }
}
